Method of forming and constructing the meshed elements of separatorsieves



D. E. HOFFMAN. METHOD OF FORMING AND CONSTRUCTING THE MESHED ELEMENTS 0F SEPARATOR SIEVES.

APPLICATION FILED OCT-14.19l9.

Patented Aug. 2, 1921.

UNITED STATES PATENT OFFICE.

DANIEL E. HOFFMAN, OF PLYMOUTH, OHIO.

METHOD 0E FORMING AND GONSTRUGTING TEE MESHED ELEMENTS 0E SEPARATOR- r. sIEvEs.

To all whom it may concern:

Be it known that I, DANIEL E. HOFFMAN, a citizen of the United States of America, residing at Plymouth, in the county of Rich-' land and State of Ohio, have invented certain new and useful Improvements in Methods of Forming and Constructing the Meshed Elements of Separator-Sieves, of which the following is a specification.

This invention relates to a means and method of forming and constructing the meshed element of a separator sieve in sections so as to facilitate and expedite its construction and eliminate the expense of making dies of more or less complication which is incidental to making and forming corrugations or flanges on the meshed element.

'Another object is to provide means of making a meshed or perforated element for a sieve of a series of sections and securely fasten the same together without the use of solder or the like. This application is a continuation of apart of an application filed Oct. 22, 1918, Serial No. 259,176.

These and other objects are attained by the method illustrated in the drawing in which:

Figure 1 shows in a conventional manner a fragmentary view of the meshed or perforated sieve blanks assembled together preparatory to fastening same to the end bars of a sieve frame.

Fig. 2 shows a method of forming the combined corrugated flanges and connecting means in series preparatory to fastening same together.

Referring to the drawing the meshed or perforated element of the sieve is preferably made of three or more sections. The method or means of constructing the meshed element of the sieve comprises means of connecting preferably three or more sections together forming the entire meshed element. In the construction of the meshed element the desired number of blanks of sheet metal to construct a predetermined size sieve are first blanked out to'form a plate substantially of rectangular form as shown at 1. One end of the blank is folded and then double folded upon itself to provide .a strengthening rib 2, along the edge of each of the outside meshed strips. The opposite edge or end of the blankis then turned at right angles to the body portion of the strip as shown at g Specification of Letters Patent.

Application filed October 14, 1919. Serial No. 330,579.v

The above described operations complete the first or one outside portion (A) of the movable meshed element. Another blank (B) is then folded upon itself as shown at i and then turned at right angles to the body portion of the blank, leaving an intervening space 5 between the fold to receive and engage the right angular portions 3 of the preceding blank (A), thereby securely connecting the blanks together. Prior to connecting the blanks, the end Goof blank B is turned at right angles to the body of-the blank, as shown in the drawings. As many intervening blanks as desired to complete the size of sieve wanted or ordered can be made 1n the same manner by repeating the operation hereinbefore described. Only one conventional intervening blank is shown. It is apparent, however, that a plurality of inter vening blanks can be used without departing from the spirit of the invention.

To. complete the sieve, a blank O is provided, for the opposite out-side edge forming the body of the movable meshed element; one edge 7 thereof is folded upon itself and turned at right angles to the body portion leaving an intervening space to receive and engage the right-angled portion 6 of the blank B; its opposite edge 8 is then double folded in the same manner and for the same purpose as described with reference to blank A.

The blanks A, B, and O are apertured as shown at 9 with apertures preferably rectangular in form. A predetermined portion of the ends 10 of the connected blanks however are not apertured so as to provide an extra plane surface and means of securely fastening the blanks by screws or the like to the end bars.

Attention is called to the fact that the connecting means of the sections also provide a series of ribs or corrugations 11 upon the meshed element which greatly strengthens the meshed element and further provides series of channels of predetermined widths so as to guide and confine the grain, straw, chaff, stems and the like in their travel over the meshed element along well defined paths which are of great assistance in thoroughly performing the function of cleaning the gram.

I claim: 7

1 The herein described method of constructing a sieve for threshing machines in sections consisting of forming a meshed blank from sheet metal, then folding the blank at one edge upon itself leaving a space between the fold, then turning the folded portion at right angles to the body portion,

then turning'the opposite edge of the blank I at. right angles to conform and coincide with tion ofthe blank, then connecting a predethe right angled folded opposite edge portermined number of the folded blanks together by inserting'the turned angular edge of -one' of the blanks in space between the next succeeding or preceding angularly rebetween the fold, then'turning the folded blank.

lated folded portion of the adjacent meshed -2.' The herein described method of constructing a sieve for threshing machines in sections consisting of forming a meshed blank from sheet metal, then folding the blank at one edge upon itself leaving a space portion atright angles to the body portion,

then turning the opposite edge of the blank the adjacent meshed blank.

3. The herein described method of forming a sieve for threshing machines consisting of forming a series ofmeshed blanks having one edge of each folded upon itself; then turning it at right angles to the-body port on, then turning its oppositeedge at rlght angles and connecting each one of the 'serles to each other by inserting the right anguportions of larly related portions between the folded portions of the next succeeding or preceding units, as described'and set forth. 7 i

4. The herein described method of forming a sieve for threshing machines consist-- ing of forming a series of meshed blanks,- having one edge of each blank folded upon itself; then turning it at right angles to the body portion; then turning its opposite edge at right angles and connecting eachone of the series to the other by inserting the right angul'arly related portion" between the folded the next succeeding or preceding units. V

5.'The herein described method of constructing a meshed sieve element for separators in. sections, by first forming meshed blanks of sheet metal; then folding one edge 7 of each blank to provide a space between the folded parts; then bending the opposite end of the'blank at right angles thereto; then inserting said bent edge in thespace between the fold of the next preceding blank; and then connecting other similar blanks thereto in same manner in series to provide the size of meshed sieve element'desi'red.

6.7 The herein described method of constructinga meshed sieve element for separators in sections by first forming meshed blanks of sheet metal :then folding one edge of each blank to provide a'space between the folded parts; then bending the opposite end atrightangles' and inserting the bent edge of the blank in the intervening space between V the foldedpartsof the next preceding blank;

then connecting thereto similar blanks in.

series by the method'described with referonce to the first mentioned'blanks' of the same or different sizes; then constructing blanks by the method described with reference to the first mentioned blanks having one edge-folded and bent at right'angles to the body and having the opposite edge folded to form ribs then connecting said blanks to the aforementioned blanks for side sections.

folding said la-st mentioned edges upon the body portion to; formribs substantially, as described and set forth! 1 8. The herein described method of constructing a meshed sieve element for threshing machines insections, consisting offorming a series of sheet metal apertured blanks; then bending one edge at right angles to the body portion; then doubling the opposite edge upon itself to provide a fold leaving a spacebetween the folded'parts; then inserting the right angled bent portion between the parts of the next preceding 'blank; then connecting thereto a pre-determined series of said blanks by the method described with referenceto the first mentioned blanks of the same or different sizes to provide the size of meshed sieve element desired; and

then connecting blanks to saidseries of blanks-for side sections whichare provided with folded edge portions and oppositely disposed "edge portions which are folded to form ribs asand for'the purpose-described. 9 The herein described method of constructinga meshed element consisting of forming a'series of sheet metal blanks having apertures provided between the ends and having the end portions thereof imperforate; then connecting a series of saidblanks together to provide a' sieve of predetermined size; then connecting side sections of blanks having imperforate side portions and folding said imperforate portions to provide and then connecting two or more of said elements together by inserting the bent edge on the loop of the adjacent blank to provide a sieve of the desired dimensions substantially as and for the purpose described.

11. The herein described method of making a complete meshed element for a sieve by providing a series of sectional parts with apertures therein, then forming a loop on one edge thereof and turning the opposite edge up at right angles to the'body portion;

then inserting the bent edge in the inter-' vening space between the loop parts of the next preceding blank; connecting a plurality of said elements together b the method described with reference to the first mentioned blanks to provide a sieve of the desired size and then connecting side blanks to said blanks which are provided with imperforate folded'edges forming ribs substantially as and for the purpose described.

12. The herein described method of constructing a meshed element for sieves for threshing machines by forming a series of meshed parts; then providing means integral with said parts consisting of bending one edge of the meshed parts at right angles to the plane of the body and forming folds at right angles to the plane of the body on the opposite edge to connect two or more of said parts in series to provide a predetermined size of a complete meshed sieve element, and then connecting sideparts to said series and folding a portion of said side parts to provide ribs substantially as and for the purpose described.

13. The herein described method of constructing a meshed element for threshing machines consisting in forming a series of meshed blanks; then forming a loop on one edge and a right angular flange on its opposite edge; then inserting the bent edge in the intervening space between the loop part of the next preceding blank; connecting a plurality of said sections together by the method described with reference to the first V mentioned blanks to provide a pre-determined size sieve element, and then folding a portion of the side sections upon itself to provide ribs substantially as and for the purpose described.

la. The herein described method of constructing a sieve for threshing machines consisting in forming a series of meshed blanks and providing integral means consisting of bending one edge of the meshed parts at right angles to the plane of the body and forming a loop at right angles to the plane of the body on the opposite edge to connect same in series; then inserting the bent edge in the intervening space between the loop part of the next preceding blank the meshed blanks having imperforate end portions.

15. The herein described method of constructing a meshed element for sieves for use in separators eonsiming of cutting blanks; then forming a series of apertures therein so as to leave the ends and sides thereof imperforate, then forming a loop at one side, and providing a flange upon the opposite side thereof; then inserting the, bent edge in the intervening space between the loop part of the next preceding blanks; then connecting by the method described with referenceto the first mentioned blanks two or more of said blanks to provide a meshed sieve element of a predetermined size.

In testimony whereof I aiiix my signature.

DANIEL E. HOFFMAN. 

